Greetings from the other side. I took a chance on this movie, and it was good enough to watch once, but just barely.
The main big woman is very annoying, even when trying to be funny. Her comedy type is very much like Melissa McCarthy, who is also not funny. She has one volume level, which is "yelling", and usually contains rude or gross remarks thinking it will get a laugh.
The main thin wowan is the straight man (woman) here, and basically follows the loud-mouths lead. I guessed the ending, and you probably will as well.
There is only so much you can do with an arm wrestling movie, and if Sylvester Stalone failed attempting this, these chicks were doomed from the start.
Anyways, the movie was good enough for a single viewing when you have nothing else to watch. Sadly, I'm at the point where I think I've seen everything worth while, and many of the good movies, I've seen multiple times. I'm stuck looking for hidden gems now.